问题
选择题
E-shopping, when properly _____, can save us a lot of time and energy. [ ]
A. done
B. doing
C. to do
D. is done
答案
答案:A
E-shopping, when properly _____, can save us a lot of time and energy. [ ]
A. done
B. doing
C. to do
D. is done
答案:A